On Mon, May 09, 2005 at 04:26:18PM +0200, Stephane Bortzmeyer wrote:
May be SMTP servers should not touch the headers. But they do (besides
the obvious of adding a Received header).
* Postfix checks the Delivered-To (loop detection).
* Most MTAs add Date, To and Message-Id if they are missing (may be
they should not, if only message submission and transfer were properly
Are you sure this is done in the MTA phase and not in the MDA oder MSA
phase? qmail e.g. also checks Delivered-To fields but it is done in the
MDA phase by qmail-local (i.e. during the delivery and this is also
where they get added). And qmail also adds Date and other fields but
it is done in the "sendmail" substitute that is the queue injector for non
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